AUXILIARY NOZZLE FOR AIR INJECTION TYPE LOOMS

摘要

An auxiliary nozzle having excellent directional stability and convergence of an air jet, the function of minimizing an attenuation factor of the speed of an air jet, and a comparatively simple construction, capable of being manufactured at a low cost, minimizing the consumption of compressed air and being reduced in number required for installation. In an auxiliary nozzle for air injection type looms which is provided with a front-end-closed flat portion on the inner surface of a pipe, and a nozzle port in the central portion of a part in the vicinity of the closed front end of the flat portion, a projection is provided on the part of the nozzle port which is in the vicinity of a base portion of the pipe, the size in the direction of thickness of a hollow part of the flat portion of the pipe being gradually reduced symmetrically with respect to the axis of the pipe toward the front end thereof in one or two steps at an equal variation rate, at least the front end portion of the pipe being able to be formed out of a ceramic material. Owing to this structure, an air jet of a high directional stability can be obtained. Since sudden volume variation does not occur in the pipe, superior air jet with a stable flow velocity can be obtained. Also, an ejection resistance can be minimized, and an air jet of a low speed attenuation factor can be obtained. Accordingly, the number of the auxiliary nozzles provided in a loom can be reduced, and the consumption of compressed air can also be reduced.